Abstract
Packages from renewable sources have been the focus of many studies, due to the consumer needs for high-quality food, environmental concern related to the inadequate discard of packaging, low percentage of packaging recycling, and starch application by a viable method. Thus, this work aimed to develop bioactive packages based on white, red, and black rice starch and analyze the influence of macromolecule and plasticizer type, even its blends, on the characteristics of films. Films were characterized by color, opacity, thickness, water solubility, water vapor permeability, and bioactive properties. The use of rice starch in the development of edible and/or biodegradable films was feasible, with all the formulations tested presenting a homogeneous matrix and the films obtained varying in hue, to the naked eye, as a function of the starch used. Variation of the type of starch and plasticizer, as well as the concentrations of the same, resulted in films with differences in all studied properties. Films prepared with 5% of starch and 30% of sorbitol showed phenolic compounds and antioxidant capacity, using the DPPH and ABTS methods, indicating that these can be considered bioactive packages and also suitable for food application.
Highlights
Rice (Oryza sativa) is considered a source of income and nutrients to many people around the world, especially in Asian countries [1]
Pigmented varieties of rice are gaining attention from researchers, due to its beneficial properties for human health. They may contribute to the reduction of chronic disease development, such as cardiovascular, Type 2 diabetes, obesity, and cancer [4]. Those properties are results of the grain composition, which is rich in health-promoting compounds such as vitamins, minerals, phytochemicals, and phenolic compounds [5,6,7,8,9]
Plasticizer significantly influenced formulations with 3% of starch and 25% of plasticizer, and sorbitol contributed to increase this parameter on the packaging
Summary
Rice (Oryza sativa) is considered a source of income and nutrients to many people around the world, especially in Asian countries [1]. The success of this cereal is associated with its nutritional value and quality, its practicality and applicability, and its characteristics of hypoallergenic and nontoxic to celiac, which makes it a great substitute for wheat, to develop gluten-free products [2]. Pigmented varieties of rice are gaining attention from researchers, due to its beneficial properties for human health They may contribute to the reduction of chronic disease development, such as cardiovascular, Type 2 diabetes, obesity, and cancer [4]. Those properties are results of the grain composition, which is rich in health-promoting compounds such as vitamins, minerals, phytochemicals, and phenolic compounds [5,6,7,8,9]
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